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asthma pathophysiology

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https://www.readbyqxmd.com/read/29223509/neuropeptides-and-breathing-in-health-and-disease
#1
REVIEW
Katarzyna Kaczyńska, Dominika Zając, Piotr Wojciechowski, Ewelina Kogut, Małgorzata Szereda-Przestaszewska
Regulatory neuropeptides control and regulate breathing in physiological and pathophysiological conditions. While they have been identified in the neurons of major respiratory areas, they can be active not only at the central level, but also at the periphery via chemoreceptors, vagal afferents, or locally within lungs and airways. Some neuropeptides, such as leptin or substance P, are respiratory stimulants; others, such as neurotensin, produce variable effects on respiration depending on the site of application...
December 6, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29222519/virtual-screening-for-inhibitors-of-the-human-tslp-tslpr-interaction
#2
Dries Van Rompaey, Kenneth Verstraete, Frank Peelman, Savvas N Savvides, Koen Augustyns, Pieter Van Der Veken, Hans De Winter
The pro-inflammatory cytokine thymic stromal lymphopoietin (TSLP) plays a pivotal role in the pathophysiology of various allergy disorders that are mediated by type 2 helper T cell (Th2) responses, such as asthma and atopic dermatitis. TSLP forms a ternary complex with the TSLP receptor (TSLPR) and the interleukin-7-receptor subunit alpha (IL-7Rα), thereby activating a signaling cascade that culminates in the release of pro-inflammatory mediators. In this study, we conducted an in silico characterization of the TSLP:TSLPR complex to investigate the drugability of this complex...
December 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29217600/asthma-phenotypes-do-cough-and-wheeze-predict-exacerbations-in-persistent-asthma
#3
Jaymin B Morjaria, Alan S Rigby, Alyn H Morice
Little is known of the long-term symptom profile in uncontrolled asthma and whether symptoms can predict distinct phenotypes. The primary objective of these analyses was to assess diurnal profile of cough and wheeze in an uncontrolled asthma population. Secondary outcomes were to examine how these symptom profiles influence response to treatment.Twice-daily electronically recorded data from 1701 patients were examined in relation to the population demographics. Reliever treatment with salbutamol was then compared with extra-fine beclometasone/formoterol maintenance and reliever therapy (MART)...
December 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29216678/-guideline-for-the-diagnosis-and-treatment-of-asthma-guideline-of-the-german-respiratory-society-and-the-german-atemwegsliga-in-cooperation-with-the-paediatric-respiratory-society-and-the-austrian-society-of-pneumology
#4
R Buhl, R Bals, X Baur, D Berdel, C-P Criée, M Gappa, A Gillissen, T Greulich, P Haidl, E Hamelmann, P Kardos, K Kenn, L Klimek, S Korn, M Lommatzsch, H Magnussen, T Nicolai, D Nowak, O Pfaar, K F Rabe, J Riedler, T Ritz, K Schultz, A Schuster, T Spindler, R C Taube, K Taube, C Vogelmeier, A von Leupold, F Wantke, S Weise, J Wildhaber, H Worth, A Zacharasiewicz
The present guideline is a new version and an update of the guideline for the diagnosis and treatment of asthma, which replaces the previous version for german speaking countries from the year 2006. The wealth of new data on the pathophysiology and the phenotypes of asthma, and the expanded spectrum of diagnostic and therapeutic options necessitated a new version and an update. This guideline presents the current, evidence-based recommendations for the diagnosis and treatment of asthma, for children and adolescents as well as for adults with asthma...
December 2017: Pneumologie
https://www.readbyqxmd.com/read/29210519/air-pollutants-may-be-environmental-risk-factors-in-chronic-rhinosinusitis-disease-progression
#5
Leila J Mady, Hannah L Schwarzbach, John A Moore, Robert M Boudreau, Thomas J Willson, Stella E Lee
BACKGROUND: Little is known about the role of environmental exposures in the pathophysiology of chronic rhinosinusitis (CRS). In this study, we measured the impact of air pollutants (particulate matter 2.5 [PM2.5 ] and black carbon [BC]) on CRS with nasal polyposis (CRSwNP) and CRS without nasal polyposis (CRSsNP). METHODS: Spatial modeling from pollutant monitoring sites was used to estimate exposures surrounding residences for patients meeting inclusion criteria (total patients, n = 234; CRSsNP, n = 96; CRSwNP, n = 138)...
December 6, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/29199167/which-diseases-are-risk-factors-for-developing-gastroesophageal-reflux-disease
#6
Filiz Akyüz, Özlem Mutluay Soyer
Although the pathophysiology of gastroesophageal reflux disease (GERD) remains unclear, it is accepted as a multifactorial disease. It is thought that some of the interventions that might cause alterations in the normal gastrointestinal tract anatomy and diseases that affect the lower esophageal sphincter, esophageal clearance, and stomach motility (gastric emptying) might lay a foundation for GERD development. Moreover, it is common knowledge that GERD might cause various extraesophageal symptoms and complications...
December 2017: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
https://www.readbyqxmd.com/read/29197547/further-studies-of-unsuspected-emphysema-in-non-smoking-asthmatics-with-persistent-expiratory-airflow-obstruction
#7
Arthur F Gelb, Alfred Yamamoto, Eric K Verbeken, Mark J Schein, Roxanna Moridzadeh, Diem Tran, Christine Fraser, Richard Barbers, Wafaa Elatre, Michael N Koss, Eric F Glassy, Jay A Nadel
BACKGROUND: Previously, we and other investigators have described reversible loss of lung elastic recoil in acute and persistent loss in moderate-to-severe, chronic, treated asthmatics who never smoked, and its adverse effect on maximal expiratory airflow. In 4 consecutive autopsies, the pathophysiologic mechanism(s)has been unsuspected mild, diffuse, middle and upper lobe centrilobular emphysema. METHODS: We performed prospective studies (5-22 years) in 25(12F) chronic asthmatics age 55±15 yr who never smoked, with persistent moderate-to-severe expiratory obstruction...
November 29, 2017: Chest
https://www.readbyqxmd.com/read/29178673/viral-infections-and-associated-factors-that-promote-acute-exacerbations-of-asthma
#8
REVIEW
Chang Keun Kim, Zak Callaway, James E Gern
Despite asthma being the most common chronic childhood ailment, there is still much to learn about the disease. Early childhood infections with well-known or emerging viruses can lay the pathophysiologic framework for asthma development and exacerbation later in life, which may be due partly to alteration of the airway microbiome. Once asthma is established, acute exacerbations are usually associated with infections with respiratory viruses, such as rhinoviruses (RVs). Once again, there are bidirectional interactions between viruses and airway bacteria that appear to influence the severity of illness and the likelihood of exacerbation...
January 2018: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/29166940/effects-of-urban-coarse-particles-inhalation-on-oxidative-and-inflammatory-parameters-in-the-mouse-lung-and-colon
#9
Cécile Vignal, Muriel Pichavant, Laurent Y Alleman, Madjid Djouina, Florian Dingreville, Esperanza Perdrix, Christophe Waxin, Adil Ouali Alami, Corinne Gower-Rousseau, Pierre Desreumaux, Mathilde Body-Malapel
BACKGROUND: Air pollution is a recognized aggravating factor for pulmonary diseases and has notably deleterious effects on asthma, bronchitis and pneumonia. Recent studies suggest that air pollution may also cause adverse effects in the gastrointestinal tract. Accumulating experimental evidence shows that immune responses in the pulmonary and intestinal mucosae are closely interrelated, and that gut-lung crosstalk controls pathophysiological processes such as responses to cigarette smoke and influenza virus infection...
November 22, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29161804/importance-of-biological-ultrafine-particles-in-indoor-dust-as-a-pathogenesis-of-chronic-inflammatory-lung-diseases
#10
Young-Koo Jee, Jinho Yang, Yoon-Keun Kim, You-Young Kim, Tae Soo Kang
The role of infectious agents in the etiology of inflammatory diseases once believed to be non-infectious is increasingly being recognized. Many bacterial components in the indoor dust can evoke inflammatory lung diseases. Bacteria secrete nanometer-sized vesicles into the extracellular milieu, so-called extracellular vesicles (EVs). which are pathophysiologically related to inflammatory diseases. Microbiota compositions in the indoor dust revealed the presence of both gram-negative and gram-positive bacteria...
November 17, 2017: Environmental Health and Toxicology
https://www.readbyqxmd.com/read/29161090/pathophysiology-to-phenotype-in-the-asthma-of-obesity
#11
Jason H T Bates, Matthew E Poynter, Christa M Frodella, Ubong Peters, Anne E Dixon, Benjamin T Suratt
Obesity affects numerous diseases, including asthma, for reasons that remain incompletely understood. Recent research suggests that the asthma of obesity is not a single disease, and that it breaks out into at least two distinct phenotypes. One phenotype is conventional allergic asthma modulated by obesity, whereas another arises solely due to the presence of obesity. The latter is postulated to be a consequence of the chronic lung compression caused by the obese chest wall in individuals with particularly collapsible lungs...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29161084/mitochondrial-dysfunction-linking-obesity-and-asthma
#12
Naveen K Bhatraju, Anurag Agrawal
The bidirectional epidemiological association between asthma and obesity is well known. Recent evidence suggests that there is an intersection of the pathophysiological molecular pathways leading to either obesity or asthma, at the level of mitochondria. This is not surprising, because mitochondria, beyond their roles as the metabolic powerhouses of the cell, serve as sensors of threats, regulators of stress signaling, and effectors of cytotoxicity. Reduced mitochondrial function and low metabolic activity are well-recognized features of obesity...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29161075/metabolic-dysregulation-systemic-inflammation-and-pediatric-obesity-related-asthma
#13
Deepa Rastogi, Fernando Holguin
Obesity-related asthma is a distinct pediatric asthma phenotype. It is associated with higher disease burden, lower pulmonary function, and suboptimal response to current asthma medications. Recent studies have made inroads into elucidating its pathophysiology. Systemic immune responses in obese children with asthma are skewed to a nonatopic T-helper cell type 1 (Th1) pattern that correlates with pulmonary function deficits. The prevalence of metabolic dysregulation is also higher among obese children with asthma than among normal-weight children with asthma...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29158683/animal-models-of-asthma-utility-and-limitations
#14
REVIEW
Marcelo Vivolo Aun, Rafael Bonamichi-Santos, Fernanda Magalhães Arantes-Costa, Jorge Kalil, Pedro Giavina-Bianchi
Clinical studies in asthma are not able to clear up all aspects of disease pathophysiology. Animal models have been developed to better understand these mechanisms and to evaluate both safety and efficacy of therapies before starting clinical trials. Several species of animals have been used in experimental models of asthma, such as Drosophila, rats, guinea pigs, cats, dogs, pigs, primates and equines. However, the most common species studied in the last two decades is mice, particularly BALB/c. Animal models of asthma try to mimic the pathophysiology of human disease...
2017: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/29153708/pathophysiology-of-il-33-and-il-17-in-allergic-disorders
#15
REVIEW
Rinkesh Kumar Gupta, Kriti Gupta, Premendra D Dwivedi
Allergic diseases are among common clinical conditions, affecting millions of children and adults throughout the world. Food allergies, skin allergies (atopic dermatitis), and respiratory allergies (allergic rhinitis and asthma) are the common types of allergies. Recently discovered cytokines IL-17 and IL-33 have been found to play an important role in the pathogenicity of various hypersensitive disorders. After exposure to allergens or infection with parasites or viruses, IL-17 and IL-33 producing cells, such as Th17 and specialized epithelial cells respectively, become activated and trigger the pathogenic immune responses in different susceptible conditions...
November 11, 2017: Cytokine & Growth Factor Reviews
https://www.readbyqxmd.com/read/29146574/mast-cell-dependent-il-33-st2-signaling-is-protective-against-the-development-of-airway-hyperresponsiveness-in-a-house-dust-mite-mouse-model-of-asthma
#16
Anna Maria Zoltowska Nilsson, Ying Lei, Mikael Adner, Gunnar P Nilsson
Interleukin-33 (IL-33) and its receptor ST2 have been influentially associated to the pathophysiology of asthma. Due to the divergent roles of IL-33 in regulating mast cell functions, there is a need to further characterize IL-33/ST2-dependent mast cell responses and their significance in the context of asthma. This study aimed to investigate how IL-33/ST2-dependent mast cell responses contribute to the development of airway hyperresponsiveness (AHR) and airway inflammation in a mouse model of house dust mite (HDM) induced asthma...
November 16, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29142269/sex-specific-association-between-asthma-and-hypertension-in-nationally-representative-young-korean-adults
#17
Hong Seok Lee, Yong-Moon Park, Kyungdo Han, Gerald Pekler, Seong-Su Lee, Soonjib Yoo, Sung Rae Kim
It has been reported that people with asthma have an increased risk of hypertension. However, little is known about the specific relationship between asthma and hypertension in young adults. Among subjects who participated in the Korea National Health and Nutrition Examination Survey conducted in 2008-2013, a total of 10,138 young adults (4,226 men and 5,912 women) aged 19-39 years were analyzed. Multiple logistic regression analysis was used to estimate adjusted odds ratios (ORs) and 95% confidence intervals (CIs)...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29140397/progress-in-the-understanding-of-the-pathology-of-allergic-asthma-and-the-potential-of-fruit-proanthocyanidins-as-modulators-of-airway-inflammation
#18
REVIEW
Sara L Coleman, Odette M Shaw
Allergic asthma is a chronic inflammatory lung disease characterized by sensitization of the airways, and the development of immunoglobulin E antibodies, to benign antigens. The established pathophysiology of asthma includes recurrent lung epithelial inflammation, excessive mucus production, bronchial smooth muscle hyperreactivity, and chronic lung tissue remodeling, resulting in reversible airflow restriction. Immune cells, including eosinophils and the recently characterized type 2 innate lymphoid cells, infiltrate into the lung tissue as part of the inflammatory response in allergic asthma...
November 15, 2017: Food & Function
https://www.readbyqxmd.com/read/29137646/the-potential-of-interleukin-37-as-an-effective-therapeutic-agent-in-asthma
#19
REVIEW
Lina Zhang, Jie Zhang, Peng Gao
Interleukin (IL)-37 belongs to the IL-1 cytokine family. It binds to IL-18Rα and recruits the orphan decoy IL-1R8. Emerging evidence shows that IL-37 is a key player in the regulation of inflammation, cellular differentiation, and proliferation. Altered IL-37 expression has been demonstrated in many inflammatory disease conditions, including asthma. In rheumatoid arthritis, IL-37 is involved in the regulation of proliferation, production of inflammatory mediators, and activation of inflammatory cells. Furthermore, this cytokine acts as a negative regulator of inflammation in inflammatory bowel disease...
November 14, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29135394/real-life-profile-of-asthma-and-chronic-obstructive-pulmonary-disease-patients-in-turkey
#20
Zeynep Mısırlıgil, Arif Çımrın, Hakan Günen, Tevfik Özlü, Aykut Çilli, Levent Akyıldız, Hasan Bayram, Bilun Gemicioğlu, Esra Uzaslan, Öznur Abadoğlu, Mecit Suerdem
Introduction: Despite the presentation of similar symptoms, the airway diseases have different underlying pathophysiological processes and must be distinguished to enable the administration of appropriate treatment. In several studies the clinician- and patient-related causes of poor compliance to treatment in asthma/chronic obstructive pulmonary disease (COPD) patients have been evaluated. This study aimed to determine the clinical and sociodemographic characteristics of newly diagnosed treatment-naïve asthma and COPD patients in Turkey...
September 2017: Tüberküloz Ve Toraks
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